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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

A fission chain reaction in uranium can be developed by________________?
A slowing down fast neutrons so that Uz fission continues by slow motion neutrons
B accelerating fast neutrons
C absorbing all neutrons
D using moderator
Correct Answer: slowing down fast neutrons so that Uz fission continues by slow motion neutrons
In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________?
A greater than 1.0
B less than 1.0
C equal to zero
D equal to 1.0
Correct Answer: equal to 1.0
The following present serious difficulty in designing reactor shield_________________?
A alpha particles
B beta particles
C thermal neutrons
D fast neutrons and gamma rays
Correct Answer: fast neutrons and gamma rays
In a fission process, maximum %age of energy is released as___________________?
A kinetic energy of neutrons
B kinetic energy of fission products
C instantaneous release of gamma rays
D gradual readioactive decay of fission products
Correct Answer: kinetic energy of fission products
In triggering fission, the following types of neutrons are desirable_________________?
A fast moving
B slow moving
C critical neutrons
D neutrons at rest
Correct Answer: slow moving
Which of the following is more appropriate for a moderator. One which_________________?
A does not absorb neutrons
B absorbs neutrons
C accelerates neutrons
D eats up neutrons
Correct Answer: does not absorb neutrons
Solid- fuel for nuclear reactions may be fabricated into various small shapes such as___________________?
A plates
B pallets
C pins
D any one of the above
Correct Answer: any one of the above
Reactors designed for propulsion applications are designed for_______________?
A natural uranium
B enriched uranium
C pure uranium
D any type of uranium
Correct Answer: enriched uranium
When a reactor becomes critical, then the production of neutrons is_________________?
A infinite
B zero
C exactly balanced by the loss of neutrons through leakage
D initiated
Correct Answer: exactly balanced by the loss of neutrons through leakage
In the breeder reactors the generation of new fissionable atom is_________________?
A at the lower rate than the consumption
B at a higher rate than the constuption
C at an equal rate of the consumption
D depends on other considerations
Correct Answer: at a higher rate than the constuption
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